MANUFACTURING METHOD OF POROUS POLYOLEFIN PARTICLE AND OIL-CONTAINING POLYOLEFIN PARTICLE

PROBLEM TO BE SOLVED: To provide a manufacturing method of a porous polyolefin particle with a high oil content, the porous polyolefin particle and an oil-containing polyolefin particle using the same. SOLUTION: In the manufacturing method of the porous polyolefin particle, a polyolefin particle is heated to 50-200°C in the presence of a solvent and is partially dissolved to prepare a partial solution of the polyolefin particle, and the partial solution of the polyolefin particle is cooled at an average cooling rate of ≥1°C/min from the temperature at which the partial solution is prepared to ≥30°C below this temperature to make the polyolefin particle porous. COPYRIGHT: (C)2005,JPO&NCIPI